/* Copyright (c) 2010-2011 Xiph.Org Foundation, Skype Limited Written by Jean-Marc Valin and Koen Vos */ /* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "celt.h" #include "entenc.h" #include "modes.h" #include "API.h" #include "stack_alloc.h" #include "float_cast.h" #include "opus.h" #include "arch.h" #include "pitch.h" #include "opus_private.h" #include "os_support.h" #include "cpu_support.h" #include "analysis.h" #include "mathops.h" #include "tuning_parameters.h" #ifdef FIXED_POINT #include "fixed/structs_FIX.h" #else #include "float/structs_FLP.h" #endif #define MAX_ENCODER_BUFFER 480 #ifndef DISABLE_FLOAT_API #define PSEUDO_SNR_THRESHOLD 316.23f /* 10^(25/10) */ #endif typedef struct { opus_val32 XX, XY, YY; opus_val16 smoothed_width; opus_val16 max_follower; } StereoWidthState; struct OpusEncoder { int celt_enc_offset; int silk_enc_offset; silk_EncControlStruct silk_mode; int application; int channels; int delay_compensation; int force_channels; int signal_type; int user_bandwidth; int max_bandwidth; int user_forced_mode; int voice_ratio; opus_int32 Fs; int use_vbr; int vbr_constraint; int variable_duration; opus_int32 bitrate_bps; opus_int32 user_bitrate_bps; int lsb_depth; int encoder_buffer; int lfe; int arch; int use_dtx; /* general DTX for both SILK and CELT */ #ifndef DISABLE_FLOAT_API TonalityAnalysisState analysis; #endif #define OPUS_ENCODER_RESET_START stream_channels int stream_channels; opus_int16 hybrid_stereo_width_Q14; opus_int32 variable_HP_smth2_Q15; opus_val16 prev_HB_gain; opus_val32 hp_mem[4]; int mode; int prev_mode; int prev_channels; int prev_framesize; int bandwidth; /* Bandwidth determined automatically from the rate (before any other adjustment) */ int auto_bandwidth; int silk_bw_switch; /* Sampling rate (at the API level) */ int first; opus_val16 * energy_masking; StereoWidthState width_mem; opus_val16 delay_buffer[MAX_ENCODER_BUFFER*2]; #ifndef DISABLE_FLOAT_API int detected_bandwidth; int nb_no_activity_frames; opus_val32 peak_signal_energy; #endif opus_uint32 rangeFinal; }; /* Transition tables for the voice and music. First column is the middle (memoriless) threshold. The second column is the hysteresis (difference with the middle) */ static const opus_int32 mono_voice_bandwidth_thresholds[8] = { 10000, 1000, /* NB<->MB */ 11000, 1000, /* MB<->WB */ 13500, 1000, /* WB<->SWB */ 14000, 2000, /* SWB<->FB */ }; static const opus_int32 mono_music_bandwidth_thresholds[8] = { 10000, 1000, /* NB<->MB */ 11000, 1000, /* MB<->WB */ 13500, 1000, /* WB<->SWB */ 14000, 2000, /* SWB<->FB */ }; static const opus_int32 stereo_voice_bandwidth_thresholds[8] = { 10000, 1000, /* NB<->MB */ 11000, 1000, /* MB<->WB */ 13500, 1000, /* WB<->SWB */ 14000, 2000, /* SWB<->FB */ }; static const opus_int32 stereo_music_bandwidth_thresholds[8] = { 10000, 1000, /* NB<->MB */ 11000, 1000, /* MB<->WB */ 13500, 1000, /* WB<->SWB */ 14000, 2000, /* SWB<->FB */ }; /* Threshold bit-rates for switching between mono and stereo */ static const opus_int32 stereo_voice_threshold = 24000; static const opus_int32 stereo_music_threshold = 24000; /* Threshold bit-rate for switching between SILK/hybrid and CELT-only */ static const opus_int32 mode_thresholds[2][2] = { /* voice */ /* music */ { 64000, 16000}, /* mono */ { 36000, 16000}, /* stereo */ }; static const opus_int32 fec_thresholds[] = { 12000, 1000, /* NB */ 14000, 1000, /* MB */ 16000, 1000, /* WB */ 20000, 1000, /* SWB */ 22000, 1000, /* FB */ }; int opus_encoder_get_size(int channels) { int silkEncSizeBytes, celtEncSizeBytes; int ret; if (channels<1 || channels > 2) return 0; ret = silk_Get_Encoder_Size( &silkEncSizeBytes ); if (ret) return 0; silkEncSizeBytes = align(silkEncSizeBytes); celtEncSizeBytes = celt_encoder_get_size(channels); return align(sizeof(OpusEncoder))+silkEncSizeBytes+celtEncSizeBytes; } int opus_encoder_init(OpusEncoder* st, opus_int32 Fs, int channels, int application) { void *silk_enc; CELTEncoder *celt_enc; int err; int ret, silkEncSizeBytes; if((Fs!=48000&&Fs!=24000&&Fs!=16000&&Fs!=12000&&Fs!=8000)||(channels!=1&&channels!=2)|| (application != OPUS_APPLICATION_VOIP && application != OPUS_APPLICATION_AUDIO && application != OPUS_APPLICATION_RESTRICTED_LOWDELAY)) return OPUS_BAD_ARG; OPUS_CLEAR((char*)st, opus_encoder_get_size(channels)); /* Create SILK encoder */ ret = silk_Get_Encoder_Size( &silkEncSizeBytes ); if (ret) return OPUS_BAD_ARG; silkEncSizeBytes = align(silkEncSizeBytes); st->silk_enc_offset = align(sizeof(OpusEncoder)); st->celt_enc_offset = st->silk_enc_offset+silkEncSizeBytes; silk_enc = (char*)st+st->silk_enc_offset; celt_enc = (CELTEncoder*)((char*)st+st->celt_enc_offset); st->stream_channels = st->channels = channels; st->Fs = Fs; st->arch = opus_select_arch(); ret = silk_InitEncoder( silk_enc, st->arch, &st->silk_mode ); if(ret)return OPUS_INTERNAL_ERROR; /* default SILK parameters */ st->silk_mode.nChannelsAPI = channels; st->silk_mode.nChannelsInternal = channels; st->silk_mode.API_sampleRate = st->Fs; st->silk_mode.maxInternalSampleRate = 16000; st->silk_mode.minInternalSampleRate = 8000; st->silk_mode.desiredInternalSampleRate = 16000; st->silk_mode.payloadSize_ms = 20; st->silk_mode.bitRate = 25000; st->silk_mode.packetLossPercentage = 0; st->silk_mode.complexity = 9; st->silk_mode.useInBandFEC = 0; st->silk_mode.useDTX = 0; st->silk_mode.useCBR = 0; st->silk_mode.reducedDependency = 0; /* Create CELT encoder */ /* Initialize CELT encoder */ err = celt_encoder_init(celt_enc, Fs, channels, st->arch); if(err!=OPUS_OK)return OPUS_INTERNAL_ERROR; celt_encoder_ctl(celt_enc, CELT_SET_SIGNALLING(0)); celt_encoder_ctl(celt_enc, OPUS_SET_COMPLEXITY(st->silk_mode.complexity)); st->use_vbr = 1; /* Makes constrained VBR the default (safer for real-time use) */ st->vbr_constraint = 1; st->user_bitrate_bps = OPUS_AUTO; st->bitrate_bps = 3000+Fs*channels; st->application = application; st->signal_type = OPUS_AUTO; st->user_bandwidth = OPUS_AUTO; st->max_bandwidth = OPUS_BANDWIDTH_FULLBAND; st->force_channels = OPUS_AUTO; st->user_forced_mode = OPUS_AUTO; st->voice_ratio = -1; st->encoder_buffer = st->Fs/100; st->lsb_depth = 24; st->variable_duration = OPUS_FRAMESIZE_ARG; /* Delay compensation of 4 ms (2.5 ms for SILK's extra look-ahead + 1.5 ms for SILK resamplers and stereo prediction) */ st->delay_compensation = st->Fs/250; st->hybrid_stereo_width_Q14 = 1 << 14; st->prev_HB_gain = Q15ONE; st->variable_HP_smth2_Q15 = silk_LSHIFT( silk_lin2log( VARIABLE_HP_MIN_CUTOFF_HZ ), 8 ); st->first = 1; st->mode = MODE_HYBRID; st->bandwidth = OPUS_BANDWIDTH_FULLBAND; #ifndef DISABLE_FLOAT_API tonality_analysis_init(&st->analysis); #endif return OPUS_OK; } static unsigned char gen_toc(int mode, int framerate, int bandwidth, int channels) { int period; unsigned char toc; period = 0; while (framerate < 400) { framerate <<= 1; period++; } if (mode == MODE_SILK_ONLY) { toc = (bandwidth-OPUS_BANDWIDTH_NARROWBAND)<<5; toc |= (period-2)<<3; } else if (mode == MODE_CELT_ONLY) { int tmp = bandwidth-OPUS_BANDWIDTH_MEDIUMBAND; if (tmp < 0) tmp = 0; toc = 0x80; toc |= tmp << 5; toc |= period<<3; } else /* Hybrid */ { toc = 0x60; toc |= (bandwidth-OPUS_BANDWIDTH_SUPERWIDEBAND)<<4; toc |= (period-2)<<3; } toc |= (channels==2)<<2; return toc; } #ifndef FIXED_POINT static void silk_biquad_float( const opus_val16 *in, /* I: Input signal */ const opus_int32 *B_Q28, /* I: MA coefficients [3] */ const opus_int32 *A_Q28, /* I: AR coefficients [2] */ opus_val32 *S, /* I/O: State vector [2] */ opus_val16 *out, /* O: Output signal */ const opus_int32 len, /* I: Signal length (must be even) */ int stride ) { /* DIRECT FORM II TRANSPOSED (uses 2 element state vector) */ opus_int k; opus_val32 vout; opus_val32 inval; opus_val32 A[2], B[3]; A[0] = (opus_val32)(A_Q28[0] * (1.f/((opus_int32)1<<28))); A[1] = (opus_val32)(A_Q28[1] * (1.f/((opus_int32)1<<28))); B[0] = (opus_val32)(B_Q28[0] * (1.f/((opus_int32)1<<28))); B[1] = (opus_val32)(B_Q28[1] * (1.f/((opus_int32)1<<28))); B[2] = (opus_val32)(B_Q28[2] * (1.f/((opus_int32)1<<28))); /* Negate A_Q28 values and split in two parts */ for( k = 0; k < len; k++ ) { /* S[ 0 ], S[ 1 ]: Q12 */ inval = in[ k*stride ]; vout = S[ 0 ] + B[0]*inval; S[ 0 ] = S[1] - vout*A[0] + B[1]*inval; S[ 1 ] = - vout*A[1] + B[2]*inval + VERY_SMALL; /* Scale back to Q0 and saturate */ out[ k*stride ] = vout; } } #endif static void hp_cutoff(const opus_val16 *in, opus_int32 cutoff_Hz, opus_val16 *out, opus_val32 *hp_mem, int len, int channels, opus_int32 Fs) { opus_int32 B_Q28[ 3 ], A_Q28[ 2 ]; opus_int32 Fc_Q19, r_Q28, r_Q22; silk_assert( cutoff_Hz <= silk_int32_MAX / SILK_FIX_CONST( 1.5 * 3.14159 / 1000, 19 ) ); Fc_Q19 = silk_DIV32_16( silk_SMULBB( SILK_FIX_CONST( 1.5 * 3.14159 / 1000, 19 ), cutoff_Hz ), Fs/1000 ); silk_assert( Fc_Q19 > 0 && Fc_Q19 < 32768 ); r_Q28 = SILK_FIX_CONST( 1.0, 28 ) - silk_MUL( SILK_FIX_CONST( 0.92, 9 ), Fc_Q19 ); /* b = r * [ 1; -2; 1 ]; */ /* a = [ 1; -2 * r * ( 1 - 0.5 * Fc^2 ); r^2 ]; */ B_Q28[ 0 ] = r_Q28; B_Q28[ 1 ] = silk_LSHIFT( -r_Q28, 1 ); B_Q28[ 2 ] = r_Q28; /* -r * ( 2 - Fc * Fc ); */ r_Q22 = silk_RSHIFT( r_Q28, 6 ); A_Q28[ 0 ] = silk_SMULWW( r_Q22, silk_SMULWW( Fc_Q19, Fc_Q19 ) - SILK_FIX_CONST( 2.0, 22 ) ); A_Q28[ 1 ] = silk_SMULWW( r_Q22, r_Q22 ); #ifdef FIXED_POINT silk_biquad_alt( in, B_Q28, A_Q28, hp_mem, out, len, channels ); if( channels == 2 ) { silk_biquad_alt( in+1, B_Q28, A_Q28, hp_mem+2, out+1, len, channels ); } #else silk_biquad_float( in, B_Q28, A_Q28, hp_mem, out, len, channels ); if( channels == 2 ) { silk_biquad_float( in+1, B_Q28, A_Q28, hp_mem+2, out+1, len, channels ); } #endif } #ifdef FIXED_POINT static void dc_reject(const opus_val16 *in, opus_int32 cutoff_Hz, opus_val16 *out, opus_val32 *hp_mem, int len, int channels, opus_int32 Fs) { int c, i; int shift; /* Approximates -round(log2(4.*cutoff_Hz/Fs)) */ shift=celt_ilog2(Fs/(cutoff_Hz*3)); for (c=0;cFs/400; if (st->user_bitrate_bps==OPUS_AUTO) return 60*st->Fs/frame_size + st->Fs*st->channels; else if (st->user_bitrate_bps==OPUS_BITRATE_MAX) return max_data_bytes*8*st->Fs/frame_size; else return st->user_bitrate_bps; } #ifndef DISABLE_FLOAT_API /* Don't use more than 60 ms for the frame size analysis */ #define MAX_DYNAMIC_FRAMESIZE 24 /* Estimates how much the bitrate will be boosted based on the sub-frame energy */ static float transient_boost(const float *E, const float *E_1, int LM, int maxM) { int i; int M; float sumE=0, sumE_1=0; float metric; M = IMIN(maxM, (1<10 ? 1 : 0;*/ /*return MAX16(0,1-exp(-.25*(metric-2.)));*/ return MIN16(1,(float)sqrt(MAX16(0,.05f*(metric-2)))); } /* Viterbi decoding trying to find the best frame size combination using look-ahead State numbering: 0: unused 1: 2.5 ms 2: 5 ms (#1) 3: 5 ms (#2) 4: 10 ms (#1) 5: 10 ms (#2) 6: 10 ms (#3) 7: 10 ms (#4) 8: 20 ms (#1) 9: 20 ms (#2) 10: 20 ms (#3) 11: 20 ms (#4) 12: 20 ms (#5) 13: 20 ms (#6) 14: 20 ms (#7) 15: 20 ms (#8) */ static int transient_viterbi(const float *E, const float *E_1, int N, int frame_cost, int rate) { int i; float cost[MAX_DYNAMIC_FRAMESIZE][16]; int states[MAX_DYNAMIC_FRAMESIZE][16]; float best_cost; int best_state; float factor; /* Take into account that we damp VBR in the 32 kb/s to 64 kb/s range. */ if (rate<80) factor=0; else if (rate>160) factor=1; else factor = (rate-80.f)/80.f; /* Makes variable framesize less aggressive at lower bitrates, but I can't find any valid theoretical justification for this (other than it seems to help) */ for (i=0;i<16;i++) { /* Impossible state */ states[0][i] = -1; cost[0][i] = 1e10; } for (i=0;i<4;i++) { cost[0][1<=0;i--) { /*printf("%d ", best_state);*/ best_state = states[i][best_state]; } /*printf("%d\n", best_state);*/ return best_state; } static int optimize_framesize(const void *x, int len, int C, opus_int32 Fs, int bitrate, opus_val16 tonality, float *mem, int buffering, downmix_func downmix) { int N; int i; float e[MAX_DYNAMIC_FRAMESIZE+4]; float e_1[MAX_DYNAMIC_FRAMESIZE+3]; opus_val32 memx; int bestLM=0; int subframe; int pos; int offset; VARDECL(opus_val32, sub); subframe = Fs/400; ALLOC(sub, subframe, opus_val32); e[0]=mem[0]; e_1[0]=1.f/(EPSILON+mem[0]); if (buffering) { /* Consider the CELT delay when not in restricted-lowdelay */ /* We assume the buffering is between 2.5 and 5 ms */ offset = 2*subframe - buffering; celt_assert(offset>=0 && offset <= subframe); len -= offset; e[1]=mem[1]; e_1[1]=1.f/(EPSILON+mem[1]); e[2]=mem[2]; e_1[2]=1.f/(EPSILON+mem[2]); pos = 3; } else { pos=1; offset=0; } N=IMIN(len/subframe, MAX_DYNAMIC_FRAMESIZE); /* Just silencing a warning, it's really initialized later */ memx = 0; for (i=0;i-1) { for (j=0;j-1) scale /= 2; for (j=0;j-1) { for (j=0;j-1) scale /= 2; for (j=0;j= OPUS_FRAMESIZE_2_5_MS && variable_duration <= OPUS_FRAMESIZE_60_MS) new_size = IMIN(3*Fs/50, (Fs/400)<<(variable_duration-OPUS_FRAMESIZE_2_5_MS)); else return -1; if (new_size>frame_size) return -1; if (400*new_size!=Fs && 200*new_size!=Fs && 100*new_size!=Fs && 50*new_size!=Fs && 25*new_size!=Fs && 50*new_size!=3*Fs) return -1; return new_size; } opus_int32 compute_frame_size(const void *analysis_pcm, int frame_size, int variable_duration, int C, opus_int32 Fs, int bitrate_bps, int delay_compensation, downmix_func downmix #ifndef DISABLE_FLOAT_API , float *subframe_mem #endif ) { #ifndef DISABLE_FLOAT_API if (variable_duration == OPUS_FRAMESIZE_VARIABLE && frame_size >= Fs/200) { int LM = 3; LM = optimize_framesize(analysis_pcm, frame_size, C, Fs, bitrate_bps, 0, subframe_mem, delay_compensation, downmix); while ((Fs/400<frame_size) LM--; frame_size = (Fs/400<XX += MULT16_32_Q15(short_alpha, xx-mem->XX); mem->XY += MULT16_32_Q15(short_alpha, xy-mem->XY); mem->YY += MULT16_32_Q15(short_alpha, yy-mem->YY); mem->XX = MAX32(0, mem->XX); mem->XY = MAX32(0, mem->XY); mem->YY = MAX32(0, mem->YY); if (MAX32(mem->XX, mem->YY)>QCONST16(8e-4f, 18)) { opus_val16 corr; opus_val16 ldiff; opus_val16 width; sqrt_xx = celt_sqrt(mem->XX); sqrt_yy = celt_sqrt(mem->YY); qrrt_xx = celt_sqrt(sqrt_xx); qrrt_yy = celt_sqrt(sqrt_yy); /* Inter-channel correlation */ mem->XY = MIN32(mem->XY, sqrt_xx*sqrt_yy); corr = SHR32(frac_div32(mem->XY,EPSILON+MULT16_16(sqrt_xx,sqrt_yy)),16); /* Approximate loudness difference */ ldiff = MULT16_16(Q15ONE, ABS16(qrrt_xx-qrrt_yy))/(EPSILON+qrrt_xx+qrrt_yy); width = MULT16_16_Q15(celt_sqrt(QCONST32(1.f,30)-MULT16_16(corr,corr)), ldiff); /* Smoothing over one second */ mem->smoothed_width += (width-mem->smoothed_width)/frame_rate; /* Peak follower */ mem->max_follower = MAX16(mem->max_follower-QCONST16(.02f,15)/frame_rate, mem->smoothed_width); } /*printf("%f %f %f %f %f ", corr/(float)Q15ONE, ldiff/(float)Q15ONE, width/(float)Q15ONE, mem->smoothed_width/(float)Q15ONE, mem->max_follower/(float)Q15ONE);*/ return EXTRACT16(MIN32(Q15ONE, MULT16_16(20, mem->max_follower))); } static int decide_fec(int useInBandFEC, int PacketLoss_perc, int last_fec, int mode, int *bandwidth, opus_int32 rate) { int orig_bandwidth; if (!useInBandFEC || PacketLoss_perc == 0 || mode == MODE_CELT_ONLY) return 0; orig_bandwidth = *bandwidth; for (;;) { opus_int32 hysteresis; opus_int32 LBRR_rate_thres_bps; /* Compute threshold for using FEC at the current bandwidth setting */ LBRR_rate_thres_bps = fec_thresholds[2*(*bandwidth - OPUS_BANDWIDTH_NARROWBAND)]; hysteresis = fec_thresholds[2*(*bandwidth - OPUS_BANDWIDTH_NARROWBAND) + 1]; if (last_fec == 1) LBRR_rate_thres_bps -= hysteresis; if (last_fec == 0) LBRR_rate_thres_bps += hysteresis; LBRR_rate_thres_bps = silk_SMULWB( silk_MUL( LBRR_rate_thres_bps, 125 - silk_min( PacketLoss_perc, 25 ) ), SILK_FIX_CONST( 0.01, 16 ) ); /* If loss <= 5%, we look at whether we have enough rate to enable FEC. If loss > 5%, we decrease the bandwidth until we can enable FEC. */ if (rate > LBRR_rate_thres_bps) return 1; else if (PacketLoss_perc <= 5) return 0; else if (*bandwidth > OPUS_BANDWIDTH_NARROWBAND) (*bandwidth)--; else break; } /* Couldn't find any bandwidth to enable FEC, keep original bandwidth. */ *bandwidth = orig_bandwidth; return 0; } static int compute_silk_rate_for_hybrid(int rate, int bandwidth, int frame20ms, int vbr, int fec) { int entry; int i; int N; int silk_rate; static int rate_table[][5] = { /* |total| |-------- SILK------------| |-- No FEC -| |--- FEC ---| 10ms 20ms 10ms 20ms */ { 0, 0, 0, 0, 0}, {12000, 10000, 10000, 11000, 11000}, {16000, 13500, 13500, 15000, 15000}, {20000, 16000, 16000, 18000, 18000}, {24000, 18000, 18000, 21000, 21000}, {32000, 22000, 22000, 28000, 28000}, {64000, 38000, 38000, 50000, 50000} }; entry = 1 + frame20ms + 2*fec; N = sizeof(rate_table)/sizeof(rate_table[0]); for (i=1;i rate) break; } if (i == N) { silk_rate = rate_table[i-1][entry]; /* For now, just give 50% of the extra bits to SILK. */ silk_rate += (rate-rate_table[i-1][0])/2; } else { opus_int32 lo, hi, x0, x1; lo = rate_table[i-1][entry]; hi = rate_table[i][entry]; x0 = rate_table[i-1][0]; x1 = rate_table[i][0]; silk_rate = (lo*(x1-rate) + hi*(rate-x0))/(x1-x0); } if (!vbr) { /* Tiny boost to SILK for CBR. We should probably tune this better. */ silk_rate += 100; } if (bandwidth==OPUS_BANDWIDTH_SUPERWIDEBAND) silk_rate += 300; return silk_rate; } /* Returns the equivalent bitrate corresponding to 20 ms frames, complexity 10 VBR operation. */ static opus_int32 compute_equiv_rate(opus_int32 bitrate, int channels, int frame_rate, int vbr, int mode, int complexity, int loss) { opus_int32 equiv; equiv = bitrate; /* Take into account overhead from smaller frames. */ equiv -= (40*channels+20)*(frame_rate - 50); /* CBR is about a 8% penalty for both SILK and CELT. */ if (!vbr) equiv -= equiv/12; /* Complexity makes about 10% difference (from 0 to 10) in general. */ equiv = equiv * (90+complexity)/100; if (mode == MODE_SILK_ONLY || mode == MODE_HYBRID) { /* SILK complexity 0-1 uses the non-delayed-decision NSQ, which costs about 20%. */ if (complexity<2) equiv = equiv*4/5; equiv -= equiv*loss/(6*loss + 10); } else if (mode == MODE_CELT_ONLY) { /* CELT complexity 0-4 doesn't have the pitch filter, which costs about 10%. */ if (complexity<5) equiv = equiv*9/10; } else { /* Mode not known yet */ /* Half the SILK loss*/ equiv -= equiv*loss/(12*loss + 20); } return equiv; } #ifndef DISABLE_FLOAT_API static int is_digital_silence(const opus_val16* pcm, int frame_size, int channels, int lsb_depth) { int silence = 0; opus_val32 sample_max = 0; sample_max = celt_maxabs16(pcm, frame_size*channels); #ifdef FIXED_POINT silence = (sample_max == 0); (void)lsb_depth; #else silence = (sample_max <= (opus_val16) 1 / (1 << lsb_depth)); #endif return silence; } #ifdef FIXED_POINT static opus_val32 compute_frame_energy(const opus_val16 *pcm, int frame_size, int channels, int arch) { int i; opus_val32 sample_max; int max_shift; int shift; opus_val32 energy = 0; int len = frame_size*channels; (void)arch; /* Max amplitude in the signal */ sample_max = celt_maxabs16(pcm, len); /* Compute the right shift required in the MAC to avoid an overflow */ max_shift = celt_ilog2(len); shift = IMAX(0, (celt_ilog2(sample_max) << 1) + max_shift - 28); /* Compute the energy */ for (i=0; i= (PSEUDO_SNR_THRESHOLD * noise_energy); } } if (is_silence || (is_noise && is_sufficiently_quiet)) { /* The number of consecutive DTX frames should be within the allowed bounds */ (*nb_no_activity_frames)++; if (*nb_no_activity_frames > NB_SPEECH_FRAMES_BEFORE_DTX) { if (*nb_no_activity_frames <= (NB_SPEECH_FRAMES_BEFORE_DTX + MAX_CONSECUTIVE_DTX)) /* Valid frame for DTX! */ return 1; else (*nb_no_activity_frames) = NB_SPEECH_FRAMES_BEFORE_DTX; } } else (*nb_no_activity_frames) = 0; return 0; } #endif opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_size, unsigned char *data, opus_int32 out_data_bytes, int lsb_depth, const void *analysis_pcm, opus_int32 analysis_size, int c1, int c2, int analysis_channels, downmix_func downmix, int float_api) { void *silk_enc; CELTEncoder *celt_enc; int i; int ret=0; opus_int32 nBytes; ec_enc enc; int bytes_target; int prefill=0; int start_band = 0; int redundancy = 0; int redundancy_bytes = 0; /* Number of bytes to use for redundancy frame */ int celt_to_silk = 0; VARDECL(opus_val16, pcm_buf); int nb_compr_bytes; int to_celt = 0; opus_uint32 redundant_rng = 0; int cutoff_Hz, hp_freq_smth1; int voice_est; /* Probability of voice in Q7 */ opus_int32 equiv_rate; int delay_compensation; int frame_rate; opus_int32 max_rate; /* Max bitrate we're allowed to use */ int curr_bandwidth; opus_val16 HB_gain; opus_int32 max_data_bytes; /* Max number of bytes we're allowed to use */ int total_buffer; opus_val16 stereo_width; const CELTMode *celt_mode; #ifndef DISABLE_FLOAT_API AnalysisInfo analysis_info; int analysis_read_pos_bak=-1; int analysis_read_subframe_bak=-1; int is_silence = 0; #endif VARDECL(opus_val16, tmp_prefill); ALLOC_STACK; max_data_bytes = IMIN(1276, out_data_bytes); st->rangeFinal = 0; if ((!st->variable_duration && 400*frame_size != st->Fs && 200*frame_size != st->Fs && 100*frame_size != st->Fs && 50*frame_size != st->Fs && 25*frame_size != st->Fs && 50*frame_size != 3*st->Fs) || (400*frame_size < st->Fs) || max_data_bytes<=0 ) { RESTORE_STACK; return OPUS_BAD_ARG; } silk_enc = (char*)st+st->silk_enc_offset; celt_enc = (CELTEncoder*)((char*)st+st->celt_enc_offset); if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY) delay_compensation = 0; else delay_compensation = st->delay_compensation; lsb_depth = IMIN(lsb_depth, st->lsb_depth); celt_encoder_ctl(celt_enc, CELT_GET_MODE(&celt_mode)); #ifndef DISABLE_FLOAT_API analysis_info.valid = 0; #ifdef FIXED_POINT if (st->silk_mode.complexity >= 10 && st->Fs==48000) #else if (st->silk_mode.complexity >= 7 && st->Fs==48000) #endif { if (is_digital_silence(pcm, frame_size, st->channels, lsb_depth)) { is_silence = 1; } else { analysis_read_pos_bak = st->analysis.read_pos; analysis_read_subframe_bak = st->analysis.read_subframe; run_analysis(&st->analysis, celt_mode, analysis_pcm, analysis_size, frame_size, c1, c2, analysis_channels, st->Fs, lsb_depth, downmix, &analysis_info); } /* Track the peak signal energy */ if (!is_silence && analysis_info.activity_probability > DTX_ACTIVITY_THRESHOLD) st->peak_signal_energy = MAX32(MULT16_32_Q15(QCONST16(0.999, 15), st->peak_signal_energy), compute_frame_energy(pcm, frame_size, st->channels, st->arch)); } #else (void)analysis_pcm; (void)analysis_size; #endif #ifndef DISABLE_FLOAT_API /* Reset voice_ratio if this frame is not silent or if analysis is disabled. * Otherwise, preserve voice_ratio from the last non-silent frame */ if (!is_silence) st->voice_ratio = -1; st->detected_bandwidth = 0; if (analysis_info.valid) { int analysis_bandwidth; if (st->signal_type == OPUS_AUTO) st->voice_ratio = (int)floor(.5+100*(1-analysis_info.music_prob)); analysis_bandwidth = analysis_info.bandwidth; if (analysis_bandwidth<=12) st->detected_bandwidth = OPUS_BANDWIDTH_NARROWBAND; else if (analysis_bandwidth<=14) st->detected_bandwidth = OPUS_BANDWIDTH_MEDIUMBAND; else if (analysis_bandwidth<=16) st->detected_bandwidth = OPUS_BANDWIDTH_WIDEBAND; else if (analysis_bandwidth<=18) st->detected_bandwidth = OPUS_BANDWIDTH_SUPERWIDEBAND; else st->detected_bandwidth = OPUS_BANDWIDTH_FULLBAND; } #else st->voice_ratio = -1; #endif if (st->channels==2 && st->force_channels!=1) stereo_width = compute_stereo_width(pcm, frame_size, st->Fs, &st->width_mem); else stereo_width = 0; total_buffer = delay_compensation; st->bitrate_bps = user_bitrate_to_bitrate(st, frame_size, max_data_bytes); frame_rate = st->Fs/frame_size; if (!st->use_vbr) { int cbrBytes; /* Multiply by 3 to make sure the division is exact. */ int frame_rate3 = 3*st->Fs/frame_size; /* We need to make sure that "int" values always fit in 16 bits. */ cbrBytes = IMIN( (3*st->bitrate_bps/8 + frame_rate3/2)/frame_rate3, max_data_bytes); st->bitrate_bps = cbrBytes*(opus_int32)frame_rate3*8/3; max_data_bytes = cbrBytes; } if (max_data_bytes<3 || st->bitrate_bps < 3*frame_rate*8 || (frame_rate<50 && (max_data_bytes*frame_rate<300 || st->bitrate_bps < 2400))) { /*If the space is too low to do something useful, emit 'PLC' frames.*/ int tocmode = st->mode; int bw = st->bandwidth == 0 ? OPUS_BANDWIDTH_NARROWBAND : st->bandwidth; if (tocmode==0) tocmode = MODE_SILK_ONLY; if (frame_rate>100) tocmode = MODE_CELT_ONLY; if (frame_rate < 50) tocmode = MODE_SILK_ONLY; if(tocmode==MODE_SILK_ONLY&&bw>OPUS_BANDWIDTH_WIDEBAND) bw=OPUS_BANDWIDTH_WIDEBAND; else if (tocmode==MODE_CELT_ONLY&&bw==OPUS_BANDWIDTH_MEDIUMBAND) bw=OPUS_BANDWIDTH_NARROWBAND; else if (tocmode==MODE_HYBRID&&bw<=OPUS_BANDWIDTH_SUPERWIDEBAND) bw=OPUS_BANDWIDTH_SUPERWIDEBAND; data[0] = gen_toc(tocmode, frame_rate, bw, st->stream_channels); ret = 1; if (!st->use_vbr) { ret = opus_packet_pad(data, ret, max_data_bytes); if (ret == OPUS_OK) ret = max_data_bytes; } RESTORE_STACK; return ret; } max_rate = frame_rate*max_data_bytes*8; /* Equivalent 20-ms rate for mode/channel/bandwidth decisions */ equiv_rate = compute_equiv_rate(st->bitrate_bps, st->channels, st->Fs/frame_size, st->use_vbr, 0, st->silk_mode.complexity, st->silk_mode.packetLossPercentage); if (st->signal_type == OPUS_SIGNAL_VOICE) voice_est = 127; else if (st->signal_type == OPUS_SIGNAL_MUSIC) voice_est = 0; else if (st->voice_ratio >= 0) { voice_est = st->voice_ratio*327>>8; /* For AUDIO, never be more than 90% confident of having speech */ if (st->application == OPUS_APPLICATION_AUDIO) voice_est = IMIN(voice_est, 115); } else if (st->application == OPUS_APPLICATION_VOIP) voice_est = 115; else voice_est = 48; if (st->force_channels!=OPUS_AUTO && st->channels == 2) { st->stream_channels = st->force_channels; } else { #ifdef FUZZING /* Random mono/stereo decision */ if (st->channels == 2 && (rand()&0x1F)==0) st->stream_channels = 3-st->stream_channels; #else /* Rate-dependent mono-stereo decision */ if (st->channels == 2) { opus_int32 stereo_threshold; stereo_threshold = stereo_music_threshold + ((voice_est*voice_est*(stereo_voice_threshold-stereo_music_threshold))>>14); if (st->stream_channels == 2) stereo_threshold -= 1000; else stereo_threshold += 1000; st->stream_channels = (equiv_rate > stereo_threshold) ? 2 : 1; } else { st->stream_channels = st->channels; } #endif } /* Update equivalent rate for channels decision. */ equiv_rate = compute_equiv_rate(st->bitrate_bps, st->stream_channels, st->Fs/frame_size, st->use_vbr, 0, st->silk_mode.complexity, st->silk_mode.packetLossPercentage); /* Mode selection depending on application and signal type */ if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY) { st->mode = MODE_CELT_ONLY; } else if (st->user_forced_mode == OPUS_AUTO) { #ifdef FUZZING /* Random mode switching */ if ((rand()&0xF)==0) { if ((rand()&0x1)==0) st->mode = MODE_CELT_ONLY; else st->mode = MODE_SILK_ONLY; } else { if (st->prev_mode==MODE_CELT_ONLY) st->mode = MODE_CELT_ONLY; else st->mode = MODE_SILK_ONLY; } #else opus_int32 mode_voice, mode_music; opus_int32 threshold; /* Interpolate based on stereo width */ mode_voice = (opus_int32)(MULT16_32_Q15(Q15ONE-stereo_width,mode_thresholds[0][0]) + MULT16_32_Q15(stereo_width,mode_thresholds[1][0])); mode_music = (opus_int32)(MULT16_32_Q15(Q15ONE-stereo_width,mode_thresholds[1][1]) + MULT16_32_Q15(stereo_width,mode_thresholds[1][1])); /* Interpolate based on speech/music probability */ threshold = mode_music + ((voice_est*voice_est*(mode_voice-mode_music))>>14); /* Bias towards SILK for VoIP because of some useful features */ if (st->application == OPUS_APPLICATION_VOIP) threshold += 8000; /*printf("%f %d\n", stereo_width/(float)Q15ONE, threshold);*/ /* Hysteresis */ if (st->prev_mode == MODE_CELT_ONLY) threshold -= 4000; else if (st->prev_mode>0) threshold += 4000; st->mode = (equiv_rate >= threshold) ? MODE_CELT_ONLY: MODE_SILK_ONLY; /* When FEC is enabled and there's enough packet loss, use SILK */ if (st->silk_mode.useInBandFEC && st->silk_mode.packetLossPercentage > (128-voice_est)>>4) st->mode = MODE_SILK_ONLY; /* When encoding voice and DTX is enabled but the generalized DTX cannot be used, because of complexity and sampling frequency settings, switch to SILK DTX and set the encoder to SILK mode */ #ifndef DISABLE_FLOAT_API st->silk_mode.useDTX = st->use_dtx && !(analysis_info.valid || is_silence); #else st->silk_mode.useDTX = st->use_dtx; #endif if (st->silk_mode.useDTX && voice_est > 100) st->mode = MODE_SILK_ONLY; #endif } else { st->mode = st->user_forced_mode; } /* Override the chosen mode to make sure we meet the requested frame size */ if (st->mode != MODE_CELT_ONLY && frame_size < st->Fs/100) st->mode = MODE_CELT_ONLY; if (st->lfe) st->mode = MODE_CELT_ONLY; /* If max_data_bytes represents less than 6 kb/s, switch to CELT-only mode */ if (max_data_bytes < (frame_rate > 50 ? 9000 : 6000)*frame_size / (st->Fs * 8)) st->mode = MODE_CELT_ONLY; if (st->stream_channels == 1 && st->prev_channels ==2 && st->silk_mode.toMono==0 && st->mode != MODE_CELT_ONLY && st->prev_mode != MODE_CELT_ONLY) { /* Delay stereo->mono transition by two frames so that SILK can do a smooth downmix */ st->silk_mode.toMono = 1; st->stream_channels = 2; } else { st->silk_mode.toMono = 0; } if (st->prev_mode > 0 && ((st->mode != MODE_CELT_ONLY && st->prev_mode == MODE_CELT_ONLY) || (st->mode == MODE_CELT_ONLY && st->prev_mode != MODE_CELT_ONLY))) { redundancy = 1; celt_to_silk = (st->mode != MODE_CELT_ONLY); if (!celt_to_silk) { /* Switch to SILK/hybrid if frame size is 10 ms or more*/ if (frame_size >= st->Fs/100) { st->mode = st->prev_mode; to_celt = 1; } else { redundancy=0; } } } /* Update equivalent rate with mode decision. */ equiv_rate = compute_equiv_rate(st->bitrate_bps, st->stream_channels, st->Fs/frame_size, st->use_vbr, st->mode, st->silk_mode.complexity, st->silk_mode.packetLossPercentage); /* For the first frame at a new SILK bandwidth */ if (st->silk_bw_switch) { redundancy = 1; celt_to_silk = 1; st->silk_bw_switch = 0; prefill=1; } if (redundancy) { /* Fair share of the max size allowed */ redundancy_bytes = IMIN(257, max_data_bytes*(opus_int32)(st->Fs/200)/(frame_size+st->Fs/200)); /* For VBR, target the actual bitrate (subject to the limit above) */ if (st->use_vbr) redundancy_bytes = IMIN(redundancy_bytes, st->bitrate_bps/1600); } if (st->mode != MODE_CELT_ONLY && st->prev_mode == MODE_CELT_ONLY) { silk_EncControlStruct dummy; silk_InitEncoder( silk_enc, st->arch, &dummy); prefill=1; } /* Automatic (rate-dependent) bandwidth selection */ if (st->mode == MODE_CELT_ONLY || st->first || st->silk_mode.allowBandwidthSwitch) { const opus_int32 *voice_bandwidth_thresholds, *music_bandwidth_thresholds; opus_int32 bandwidth_thresholds[8]; int bandwidth = OPUS_BANDWIDTH_FULLBAND; if (st->channels==2 && st->force_channels!=1) { voice_bandwidth_thresholds = stereo_voice_bandwidth_thresholds; music_bandwidth_thresholds = stereo_music_bandwidth_thresholds; } else { voice_bandwidth_thresholds = mono_voice_bandwidth_thresholds; music_bandwidth_thresholds = mono_music_bandwidth_thresholds; } /* Interpolate bandwidth thresholds depending on voice estimation */ for (i=0;i<8;i++) { bandwidth_thresholds[i] = music_bandwidth_thresholds[i] + ((voice_est*voice_est*(voice_bandwidth_thresholds[i]-music_bandwidth_thresholds[i]))>>14); } do { int threshold, hysteresis; threshold = bandwidth_thresholds[2*(bandwidth-OPUS_BANDWIDTH_MEDIUMBAND)]; hysteresis = bandwidth_thresholds[2*(bandwidth-OPUS_BANDWIDTH_MEDIUMBAND)+1]; if (!st->first) { if (st->auto_bandwidth >= bandwidth) threshold -= hysteresis; else threshold += hysteresis; } if (equiv_rate >= threshold) break; } while (--bandwidth>OPUS_BANDWIDTH_NARROWBAND); st->bandwidth = st->auto_bandwidth = bandwidth; /* Prevents any transition to SWB/FB until the SILK layer has fully switched to WB mode and turned the variable LP filter off */ if (!st->first && st->mode != MODE_CELT_ONLY && !st->silk_mode.inWBmodeWithoutVariableLP && st->bandwidth > OPUS_BANDWIDTH_WIDEBAND) st->bandwidth = OPUS_BANDWIDTH_WIDEBAND; } if (st->bandwidth>st->max_bandwidth) st->bandwidth = st->max_bandwidth; if (st->user_bandwidth != OPUS_AUTO) st->bandwidth = st->user_bandwidth; /* This prevents us from using hybrid at unsafe CBR/max rates */ if (st->mode != MODE_CELT_ONLY && max_rate < 15000) { st->bandwidth = IMIN(st->bandwidth, OPUS_BANDWIDTH_WIDEBAND); } /* Prevents Opus from wasting bits on frequencies that are above the Nyquist rate of the input signal */ if (st->Fs <= 24000 && st->bandwidth > OPUS_BANDWIDTH_SUPERWIDEBAND) st->bandwidth = OPUS_BANDWIDTH_SUPERWIDEBAND; if (st->Fs <= 16000 && st->bandwidth > OPUS_BANDWIDTH_WIDEBAND) st->bandwidth = OPUS_BANDWIDTH_WIDEBAND; if (st->Fs <= 12000 && st->bandwidth > OPUS_BANDWIDTH_MEDIUMBAND) st->bandwidth = OPUS_BANDWIDTH_MEDIUMBAND; if (st->Fs <= 8000 && st->bandwidth > OPUS_BANDWIDTH_NARROWBAND) st->bandwidth = OPUS_BANDWIDTH_NARROWBAND; #ifndef DISABLE_FLOAT_API /* Use detected bandwidth to reduce the encoded bandwidth. */ if (st->detected_bandwidth && st->user_bandwidth == OPUS_AUTO) { int min_detected_bandwidth; /* Makes bandwidth detection more conservative just in case the detector gets it wrong when we could have coded a high bandwidth transparently. When operating in SILK/hybrid mode, we don't go below wideband to avoid more complicated switches that require redundancy. */ if (equiv_rate <= 18000*st->stream_channels && st->mode == MODE_CELT_ONLY) min_detected_bandwidth = OPUS_BANDWIDTH_NARROWBAND; else if (equiv_rate <= 24000*st->stream_channels && st->mode == MODE_CELT_ONLY) min_detected_bandwidth = OPUS_BANDWIDTH_MEDIUMBAND; else if (equiv_rate <= 30000*st->stream_channels) min_detected_bandwidth = OPUS_BANDWIDTH_WIDEBAND; else if (equiv_rate <= 44000*st->stream_channels) min_detected_bandwidth = OPUS_BANDWIDTH_SUPERWIDEBAND; else min_detected_bandwidth = OPUS_BANDWIDTH_FULLBAND; st->detected_bandwidth = IMAX(st->detected_bandwidth, min_detected_bandwidth); st->bandwidth = IMIN(st->bandwidth, st->detected_bandwidth); } #endif st->silk_mode.LBRR_coded = decide_fec(st->silk_mode.useInBandFEC, st->silk_mode.packetLossPercentage, st->silk_mode.LBRR_coded, st->mode, &st->bandwidth, equiv_rate); celt_encoder_ctl(celt_enc, OPUS_SET_LSB_DEPTH(lsb_depth)); /* CELT mode doesn't support mediumband, use wideband instead */ if (st->mode == MODE_CELT_ONLY && st->bandwidth == OPUS_BANDWIDTH_MEDIUMBAND) st->bandwidth = OPUS_BANDWIDTH_WIDEBAND; if (st->lfe) st->bandwidth = OPUS_BANDWIDTH_NARROWBAND; /* Can't support higher than wideband for >20 ms frames */ if (frame_size > st->Fs/50 && (st->mode == MODE_CELT_ONLY || st->bandwidth > OPUS_BANDWIDTH_WIDEBAND)) { VARDECL(unsigned char, tmp_data); int nb_frames; int bak_mode, bak_bandwidth, bak_channels, bak_to_mono; VARDECL(OpusRepacketizer, rp); opus_int32 bytes_per_frame; opus_int32 repacketize_len; #ifndef DISABLE_FLOAT_API if (analysis_read_pos_bak!= -1) { st->analysis.read_pos = analysis_read_pos_bak; st->analysis.read_subframe = analysis_read_subframe_bak; } #endif nb_frames = frame_size > st->Fs/25 ? 3 : 2; bytes_per_frame = IMIN(1276,(out_data_bytes-3)/nb_frames); ALLOC(tmp_data, nb_frames*bytes_per_frame, unsigned char); ALLOC(rp, 1, OpusRepacketizer); opus_repacketizer_init(rp); bak_mode = st->user_forced_mode; bak_bandwidth = st->user_bandwidth; bak_channels = st->force_channels; st->user_forced_mode = st->mode; st->user_bandwidth = st->bandwidth; st->force_channels = st->stream_channels; bak_to_mono = st->silk_mode.toMono; if (bak_to_mono) st->force_channels = 1; else st->prev_channels = st->stream_channels; for (i=0;isilk_mode.toMono = 0; /* When switching from SILK/Hybrid to CELT, only ask for a switch at the last frame */ if (to_celt && i==nb_frames-1) st->user_forced_mode = MODE_CELT_ONLY; tmp_len = opus_encode_native(st, pcm+i*(st->channels*st->Fs/50), st->Fs/50, tmp_data+i*bytes_per_frame, bytes_per_frame, lsb_depth, NULL, 0, c1, c2, analysis_channels, downmix, float_api); if (tmp_len<0) { RESTORE_STACK; return OPUS_INTERNAL_ERROR; } ret = opus_repacketizer_cat(rp, tmp_data+i*bytes_per_frame, tmp_len); if (ret<0) { RESTORE_STACK; return OPUS_INTERNAL_ERROR; } } if (st->use_vbr) repacketize_len = out_data_bytes; else repacketize_len = IMIN(3*st->bitrate_bps/(3*8*50/nb_frames), out_data_bytes); ret = opus_repacketizer_out_range_impl(rp, 0, nb_frames, data, repacketize_len, 0, !st->use_vbr); if (ret<0) { RESTORE_STACK; return OPUS_INTERNAL_ERROR; } st->user_forced_mode = bak_mode; st->user_bandwidth = bak_bandwidth; st->force_channels = bak_channels; st->silk_mode.toMono = bak_to_mono; RESTORE_STACK; return ret; } curr_bandwidth = st->bandwidth; /* Chooses the appropriate mode for speech *NEVER* switch to/from CELT-only mode here as this will invalidate some assumptions */ if (st->mode == MODE_SILK_ONLY && curr_bandwidth > OPUS_BANDWIDTH_WIDEBAND) st->mode = MODE_HYBRID; if (st->mode == MODE_HYBRID && curr_bandwidth <= OPUS_BANDWIDTH_WIDEBAND) st->mode = MODE_SILK_ONLY; /* printf("%d %d %d %d\n", st->bitrate_bps, st->stream_channels, st->mode, curr_bandwidth); */ bytes_target = IMIN(max_data_bytes-redundancy_bytes, st->bitrate_bps * frame_size / (st->Fs * 8)) - 1; data += 1; ec_enc_init(&enc, data, max_data_bytes-1); ALLOC(pcm_buf, (total_buffer+frame_size)*st->channels, opus_val16); OPUS_COPY(pcm_buf, &st->delay_buffer[(st->encoder_buffer-total_buffer)*st->channels], total_buffer*st->channels); if (st->mode == MODE_CELT_ONLY) hp_freq_smth1 = silk_LSHIFT( silk_lin2log( VARIABLE_HP_MIN_CUTOFF_HZ ), 8 ); else hp_freq_smth1 = ((silk_encoder*)silk_enc)->state_Fxx[0].sCmn.variable_HP_smth1_Q15; st->variable_HP_smth2_Q15 = silk_SMLAWB( st->variable_HP_smth2_Q15, hp_freq_smth1 - st->variable_HP_smth2_Q15, SILK_FIX_CONST( VARIABLE_HP_SMTH_COEF2, 16 ) ); /* convert from log scale to Hertz */ cutoff_Hz = silk_log2lin( silk_RSHIFT( st->variable_HP_smth2_Q15, 8 ) ); if (st->application == OPUS_APPLICATION_VOIP) { hp_cutoff(pcm, cutoff_Hz, &pcm_buf[total_buffer*st->channels], st->hp_mem, frame_size, st->channels, st->Fs); } else { dc_reject(pcm, 3, &pcm_buf[total_buffer*st->channels], st->hp_mem, frame_size, st->channels, st->Fs); } #ifndef FIXED_POINT if (float_api) { opus_val32 sum; sum = celt_inner_prod(&pcm_buf[total_buffer*st->channels], &pcm_buf[total_buffer*st->channels], frame_size*st->channels, st->arch); /* This should filter out both NaNs and ridiculous signals that could cause NaNs further down. */ if (!(sum < 1e9f) || celt_isnan(sum)) { OPUS_CLEAR(&pcm_buf[total_buffer*st->channels], frame_size*st->channels); st->hp_mem[0] = st->hp_mem[1] = st->hp_mem[2] = st->hp_mem[3] = 0; } } #endif /* SILK processing */ HB_gain = Q15ONE; if (st->mode != MODE_CELT_ONLY) { opus_int32 total_bitRate, celt_rate; #ifdef FIXED_POINT const opus_int16 *pcm_silk; #else VARDECL(opus_int16, pcm_silk); ALLOC(pcm_silk, st->channels*frame_size, opus_int16); #endif /* Distribute bits between SILK and CELT */ total_bitRate = 8 * bytes_target * frame_rate; if( st->mode == MODE_HYBRID ) { /* Base rate for SILK */ st->silk_mode.bitRate = compute_silk_rate_for_hybrid(total_bitRate, curr_bandwidth, st->Fs == 50 * frame_size, st->use_vbr, st->silk_mode.LBRR_coded); if (!st->energy_masking) { /* Increasingly attenuate high band when it gets allocated fewer bits */ celt_rate = total_bitRate - st->silk_mode.bitRate; HB_gain = Q15ONE - SHR32(celt_exp2(-celt_rate * QCONST16(1.f/1024, 10)), 1); } } else { /* SILK gets all bits */ st->silk_mode.bitRate = total_bitRate; } /* Surround masking for SILK */ if (st->energy_masking && st->use_vbr && !st->lfe) { opus_val32 mask_sum=0; opus_val16 masking_depth; opus_int32 rate_offset; int c; int end = 17; opus_int16 srate = 16000; if (st->bandwidth == OPUS_BANDWIDTH_NARROWBAND) { end = 13; srate = 8000; } else if (st->bandwidth == OPUS_BANDWIDTH_MEDIUMBAND) { end = 15; srate = 12000; } for (c=0;cchannels;c++) { for(i=0;ienergy_masking[21*c+i], QCONST16(.5f, DB_SHIFT)), -QCONST16(2.0f, DB_SHIFT)); if (mask > 0) mask = HALF16(mask); mask_sum += mask; } } /* Conservative rate reduction, we cut the masking in half */ masking_depth = mask_sum / end*st->channels; masking_depth += QCONST16(.2f, DB_SHIFT); rate_offset = (opus_int32)PSHR32(MULT16_16(srate, masking_depth), DB_SHIFT); rate_offset = MAX32(rate_offset, -2*st->silk_mode.bitRate/3); /* Split the rate change between the SILK and CELT part for hybrid. */ if (st->bandwidth==OPUS_BANDWIDTH_SUPERWIDEBAND || st->bandwidth==OPUS_BANDWIDTH_FULLBAND) st->silk_mode.bitRate += 3*rate_offset/5; else st->silk_mode.bitRate += rate_offset; bytes_target += rate_offset * frame_size / (8 * st->Fs); } st->silk_mode.payloadSize_ms = 1000 * frame_size / st->Fs; st->silk_mode.nChannelsAPI = st->channels; st->silk_mode.nChannelsInternal = st->stream_channels; if (curr_bandwidth == OPUS_BANDWIDTH_NARROWBAND) { st->silk_mode.desiredInternalSampleRate = 8000; } else if (curr_bandwidth == OPUS_BANDWIDTH_MEDIUMBAND) { st->silk_mode.desiredInternalSampleRate = 12000; } else { silk_assert( st->mode == MODE_HYBRID || curr_bandwidth == OPUS_BANDWIDTH_WIDEBAND ); st->silk_mode.desiredInternalSampleRate = 16000; } if( st->mode == MODE_HYBRID ) { /* Don't allow bandwidth reduction at lowest bitrates in hybrid mode */ st->silk_mode.minInternalSampleRate = 16000; } else { st->silk_mode.minInternalSampleRate = 8000; } st->silk_mode.maxInternalSampleRate = 16000; if (st->mode == MODE_SILK_ONLY) { opus_int32 effective_max_rate = max_rate; if (frame_rate > 50) effective_max_rate = effective_max_rate*2/3; if (effective_max_rate < 8000) { st->silk_mode.maxInternalSampleRate = 12000; st->silk_mode.desiredInternalSampleRate = IMIN(12000, st->silk_mode.desiredInternalSampleRate); } if (effective_max_rate < 7000) { st->silk_mode.maxInternalSampleRate = 8000; st->silk_mode.desiredInternalSampleRate = IMIN(8000, st->silk_mode.desiredInternalSampleRate); } } st->silk_mode.useCBR = !st->use_vbr; /* Call SILK encoder for the low band */ nBytes = IMIN(1275, max_data_bytes-1-redundancy_bytes); st->silk_mode.maxBits = nBytes*8; if (st->silk_mode.useCBR) { if (st->mode == MODE_HYBRID) { st->silk_mode.maxBits = st->silk_mode.bitRate * frame_size / st->Fs; } } else { /* Constrained VBR. */ if (st->mode == MODE_HYBRID) { /* Compute SILK bitrate corresponding to the max total bits available */ opus_int32 maxBitRate = compute_silk_rate_for_hybrid(nBytes*8*st->Fs / frame_size, curr_bandwidth, st->Fs == 50 * frame_size, st->use_vbr, st->silk_mode.LBRR_coded); st->silk_mode.maxBits = maxBitRate * frame_size / st->Fs; } } if (prefill) { opus_int32 zero=0; int prefill_offset; /* Use a smooth onset for the SILK prefill to avoid the encoder trying to encode a discontinuity. The exact location is what we need to avoid leaving any "gap" in the audio when mixing with the redundant CELT frame. Here we can afford to overwrite st->delay_buffer because the only thing that uses it before it gets rewritten is tmp_prefill[] and even then only the part after the ramp really gets used (rather than sent to the encoder and discarded) */ prefill_offset = st->channels*(st->encoder_buffer-st->delay_compensation-st->Fs/400); gain_fade(st->delay_buffer+prefill_offset, st->delay_buffer+prefill_offset, 0, Q15ONE, celt_mode->overlap, st->Fs/400, st->channels, celt_mode->window, st->Fs); OPUS_CLEAR(st->delay_buffer, prefill_offset); #ifdef FIXED_POINT pcm_silk = st->delay_buffer; #else for (i=0;iencoder_buffer*st->channels;i++) pcm_silk[i] = FLOAT2INT16(st->delay_buffer[i]); #endif silk_Encode( silk_enc, &st->silk_mode, pcm_silk, st->encoder_buffer, NULL, &zero, 1 ); } #ifdef FIXED_POINT pcm_silk = pcm_buf+total_buffer*st->channels; #else for (i=0;ichannels;i++) pcm_silk[i] = FLOAT2INT16(pcm_buf[total_buffer*st->channels + i]); #endif ret = silk_Encode( silk_enc, &st->silk_mode, pcm_silk, frame_size, &enc, &nBytes, 0 ); if( ret ) { /*fprintf (stderr, "SILK encode error: %d\n", ret);*/ /* Handle error */ RESTORE_STACK; return OPUS_INTERNAL_ERROR; } if (nBytes==0) { st->rangeFinal = 0; data[-1] = gen_toc(st->mode, st->Fs/frame_size, curr_bandwidth, st->stream_channels); RESTORE_STACK; return 1; } /* Extract SILK internal bandwidth for signaling in first byte */ if( st->mode == MODE_SILK_ONLY ) { if( st->silk_mode.internalSampleRate == 8000 ) { curr_bandwidth = OPUS_BANDWIDTH_NARROWBAND; } else if( st->silk_mode.internalSampleRate == 12000 ) { curr_bandwidth = OPUS_BANDWIDTH_MEDIUMBAND; } else if( st->silk_mode.internalSampleRate == 16000 ) { curr_bandwidth = OPUS_BANDWIDTH_WIDEBAND; } } else { silk_assert( st->silk_mode.internalSampleRate == 16000 ); } st->silk_mode.opusCanSwitch = st->silk_mode.switchReady; /* FIXME: How do we allocate the redundancy for CBR? */ if (st->silk_mode.opusCanSwitch) { redundancy = 1; celt_to_silk = 0; st->silk_bw_switch = 1; } } /* CELT processing */ { int endband=21; switch(curr_bandwidth) { case OPUS_BANDWIDTH_NARROWBAND: endband = 13; break; case OPUS_BANDWIDTH_MEDIUMBAND: case OPUS_BANDWIDTH_WIDEBAND: endband = 17; break; case OPUS_BANDWIDTH_SUPERWIDEBAND: endband = 19; break; case OPUS_BANDWIDTH_FULLBAND: endband = 21; break; } celt_encoder_ctl(celt_enc, CELT_SET_END_BAND(endband)); celt_encoder_ctl(celt_enc, CELT_SET_CHANNELS(st->stream_channels)); } celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(OPUS_BITRATE_MAX)); if (st->mode != MODE_SILK_ONLY) { opus_val32 celt_pred=2; celt_encoder_ctl(celt_enc, OPUS_SET_VBR(0)); /* We may still decide to disable prediction later */ if (st->silk_mode.reducedDependency) celt_pred = 0; celt_encoder_ctl(celt_enc, CELT_SET_PREDICTION(celt_pred)); if (st->mode == MODE_HYBRID) { int len; len = (ec_tell(&enc)+7)>>3; if (redundancy) len += st->mode == MODE_HYBRID ? 3 : 1; if( st->use_vbr ) { celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(st->bitrate_bps-st->silk_mode.bitRate)); nb_compr_bytes = max_data_bytes-1-redundancy_bytes; celt_encoder_ctl(celt_enc, OPUS_SET_VBR_CONSTRAINT(0)); } else { /* check if SILK used up too much */ nb_compr_bytes = len > bytes_target ? len : bytes_target; } } else { if (st->use_vbr) { opus_int32 bonus=0; #ifndef DISABLE_FLOAT_API if (st->variable_duration==OPUS_FRAMESIZE_VARIABLE && frame_size != st->Fs/50) { bonus = (60*st->stream_channels+40)*(st->Fs/frame_size-50); if (analysis_info.valid) bonus = (opus_int32)(bonus*(1.f+.5f*analysis_info.tonality)); } #endif celt_encoder_ctl(celt_enc, OPUS_SET_VBR(1)); celt_encoder_ctl(celt_enc, OPUS_SET_VBR_CONSTRAINT(st->vbr_constraint)); celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(st->bitrate_bps+bonus)); nb_compr_bytes = max_data_bytes-1-redundancy_bytes; } else { nb_compr_bytes = bytes_target; } } } else { nb_compr_bytes = 0; } ALLOC(tmp_prefill, st->channels*st->Fs/400, opus_val16); if (st->mode != MODE_SILK_ONLY && st->mode != st->prev_mode && st->prev_mode > 0) { OPUS_COPY(tmp_prefill, &st->delay_buffer[(st->encoder_buffer-total_buffer-st->Fs/400)*st->channels], st->channels*st->Fs/400); } if (st->channels*(st->encoder_buffer-(frame_size+total_buffer)) > 0) { OPUS_MOVE(st->delay_buffer, &st->delay_buffer[st->channels*frame_size], st->channels*(st->encoder_buffer-frame_size-total_buffer)); OPUS_COPY(&st->delay_buffer[st->channels*(st->encoder_buffer-frame_size-total_buffer)], &pcm_buf[0], (frame_size+total_buffer)*st->channels); } else { OPUS_COPY(st->delay_buffer, &pcm_buf[(frame_size+total_buffer-st->encoder_buffer)*st->channels], st->encoder_buffer*st->channels); } /* gain_fade() and stereo_fade() need to be after the buffer copying because we don't want any of this to affect the SILK part */ if( st->prev_HB_gain < Q15ONE || HB_gain < Q15ONE ) { gain_fade(pcm_buf, pcm_buf, st->prev_HB_gain, HB_gain, celt_mode->overlap, frame_size, st->channels, celt_mode->window, st->Fs); } st->prev_HB_gain = HB_gain; if (st->mode != MODE_HYBRID || st->stream_channels==1) st->silk_mode.stereoWidth_Q14 = IMIN((1<<14),2*IMAX(0,equiv_rate-24000)); if( !st->energy_masking && st->channels == 2 ) { /* Apply stereo width reduction (at low bitrates) */ if( st->hybrid_stereo_width_Q14 < (1 << 14) || st->silk_mode.stereoWidth_Q14 < (1 << 14) ) { opus_val16 g1, g2; g1 = st->hybrid_stereo_width_Q14; g2 = (opus_val16)(st->silk_mode.stereoWidth_Q14); #ifdef FIXED_POINT g1 = g1==16384 ? Q15ONE : SHL16(g1,1); g2 = g2==16384 ? Q15ONE : SHL16(g2,1); #else g1 *= (1.f/16384); g2 *= (1.f/16384); #endif stereo_fade(pcm_buf, pcm_buf, g1, g2, celt_mode->overlap, frame_size, st->channels, celt_mode->window, st->Fs); st->hybrid_stereo_width_Q14 = st->silk_mode.stereoWidth_Q14; } } if ( st->mode != MODE_CELT_ONLY && ec_tell(&enc)+17+20*(st->mode == MODE_HYBRID) <= 8*(max_data_bytes-1)) { /* For SILK mode, the redundancy is inferred from the length */ if (st->mode == MODE_HYBRID && (redundancy || ec_tell(&enc)+37 <= 8*nb_compr_bytes)) ec_enc_bit_logp(&enc, redundancy, 12); if (redundancy) { int max_redundancy; ec_enc_bit_logp(&enc, celt_to_silk, 1); if (st->mode == MODE_HYBRID) max_redundancy = (max_data_bytes-1)-nb_compr_bytes; else max_redundancy = (max_data_bytes-1)-((ec_tell(&enc)+7)>>3); /* Target the same bit-rate for redundancy as for the rest, up to a max of 257 bytes */ redundancy_bytes = IMIN(max_redundancy, st->bitrate_bps/1600); redundancy_bytes = IMIN(257, IMAX(2, redundancy_bytes)); if (st->mode == MODE_HYBRID) ec_enc_uint(&enc, redundancy_bytes-2, 256); } } else { redundancy = 0; } if (!redundancy) { st->silk_bw_switch = 0; redundancy_bytes = 0; } if (st->mode != MODE_CELT_ONLY)start_band=17; if (st->mode == MODE_SILK_ONLY) { ret = (ec_tell(&enc)+7)>>3; ec_enc_done(&enc); nb_compr_bytes = ret; } else { nb_compr_bytes = IMIN((max_data_bytes-1)-redundancy_bytes, nb_compr_bytes); ec_enc_shrink(&enc, nb_compr_bytes); } #ifndef DISABLE_FLOAT_API if (redundancy || st->mode != MODE_SILK_ONLY) celt_encoder_ctl(celt_enc, CELT_SET_ANALYSIS(&analysis_info)); #endif if (st->mode == MODE_HYBRID) { SILKInfo info; info.signalType = st->silk_mode.signalType; info.offset = st->silk_mode.offset; celt_encoder_ctl(celt_enc, CELT_SET_SILK_INFO(&info)); } else { celt_encoder_ctl(celt_enc, CELT_SET_SILK_INFO((SILKInfo*)NULL)); } /* 5 ms redundant frame for CELT->SILK */ if (redundancy && celt_to_silk) { int err; celt_encoder_ctl(celt_enc, CELT_SET_START_BAND(0)); celt_encoder_ctl(celt_enc, OPUS_SET_VBR(0)); celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(OPUS_BITRATE_MAX)); err = celt_encode_with_ec(celt_enc, pcm_buf, st->Fs/200, data+nb_compr_bytes, redundancy_bytes, NULL); if (err < 0) { RESTORE_STACK; return OPUS_INTERNAL_ERROR; } celt_encoder_ctl(celt_enc, OPUS_GET_FINAL_RANGE(&redundant_rng)); celt_encoder_ctl(celt_enc, OPUS_RESET_STATE); } celt_encoder_ctl(celt_enc, CELT_SET_START_BAND(start_band)); if (st->mode != MODE_SILK_ONLY) { if (st->mode != st->prev_mode && st->prev_mode > 0) { unsigned char dummy[2]; celt_encoder_ctl(celt_enc, OPUS_RESET_STATE); /* Prefilling */ celt_encode_with_ec(celt_enc, tmp_prefill, st->Fs/400, dummy, 2, NULL); celt_encoder_ctl(celt_enc, CELT_SET_PREDICTION(0)); } /* If false, we already busted the budget and we'll end up with a "PLC packet" */ if (ec_tell(&enc) <= 8*nb_compr_bytes) { /* Set the bitrate again if it was overridden in the redundancy code above*/ if (redundancy && celt_to_silk && st->mode==MODE_HYBRID && st->use_vbr) celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(st->bitrate_bps-st->silk_mode.bitRate)); celt_encoder_ctl(celt_enc, OPUS_SET_VBR(st->use_vbr)); ret = celt_encode_with_ec(celt_enc, pcm_buf, frame_size, NULL, nb_compr_bytes, &enc); if (ret < 0) { RESTORE_STACK; return OPUS_INTERNAL_ERROR; } /* Put CELT->SILK redundancy data in the right place. */ if (redundancy && celt_to_silk && st->mode==MODE_HYBRID && st->use_vbr) { OPUS_COPY(data+ret, data+nb_compr_bytes, redundancy_bytes); nb_compr_bytes = nb_compr_bytes+redundancy_bytes; } } } /* 5 ms redundant frame for SILK->CELT */ if (redundancy && !celt_to_silk) { int err; unsigned char dummy[2]; int N2, N4; N2 = st->Fs/200; N4 = st->Fs/400; celt_encoder_ctl(celt_enc, OPUS_RESET_STATE); celt_encoder_ctl(celt_enc, CELT_SET_START_BAND(0)); celt_encoder_ctl(celt_enc, CELT_SET_PREDICTION(0)); celt_encoder_ctl(celt_enc, OPUS_SET_VBR(0)); celt_encoder_ctl(celt_enc, OPUS_SET_BITRATE(OPUS_BITRATE_MAX)); if (st->mode == MODE_HYBRID) { /* Shrink packet to what the encoder actually used. */ nb_compr_bytes = ret; ec_enc_shrink(&enc, nb_compr_bytes); } /* NOTE: We could speed this up slightly (at the expense of code size) by just adding a function that prefills the buffer */ celt_encode_with_ec(celt_enc, pcm_buf+st->channels*(frame_size-N2-N4), N4, dummy, 2, NULL); err = celt_encode_with_ec(celt_enc, pcm_buf+st->channels*(frame_size-N2), N2, data+nb_compr_bytes, redundancy_bytes, NULL); if (err < 0) { RESTORE_STACK; return OPUS_INTERNAL_ERROR; } celt_encoder_ctl(celt_enc, OPUS_GET_FINAL_RANGE(&redundant_rng)); } /* Signalling the mode in the first byte */ data--; data[0] = gen_toc(st->mode, st->Fs/frame_size, curr_bandwidth, st->stream_channels); st->rangeFinal = enc.rng ^ redundant_rng; if (to_celt) st->prev_mode = MODE_CELT_ONLY; else st->prev_mode = st->mode; st->prev_channels = st->stream_channels; st->prev_framesize = frame_size; st->first = 0; /* DTX decision */ #ifndef DISABLE_FLOAT_API if (st->use_dtx && (analysis_info.valid || is_silence)) { if (decide_dtx_mode(analysis_info.activity_probability, &st->nb_no_activity_frames, st->peak_signal_energy, pcm, frame_size, st->channels, is_silence, st->arch)) { st->rangeFinal = 0; data[0] = gen_toc(st->mode, st->Fs/frame_size, curr_bandwidth, st->stream_channels); RESTORE_STACK; return 1; } } #endif /* In the unlikely case that the SILK encoder busted its target, tell the decoder to call the PLC */ if (ec_tell(&enc) > (max_data_bytes-1)*8) { if (max_data_bytes < 2) { RESTORE_STACK; return OPUS_BUFFER_TOO_SMALL; } data[1] = 0; ret = 1; st->rangeFinal = 0; } else if (st->mode==MODE_SILK_ONLY&&!redundancy) { /*When in LPC only mode it's perfectly reasonable to strip off trailing zero bytes as the required range decoder behavior is to fill these in. This can't be done when the MDCT modes are used because the decoder needs to know the actual length for allocation purposes.*/ while(ret>2&&data[ret]==0)ret--; } /* Count ToC and redundancy */ ret += 1+redundancy_bytes; if (!st->use_vbr) { if (opus_packet_pad(data, ret, max_data_bytes) != OPUS_OK) { RESTORE_STACK; return OPUS_INTERNAL_ERROR; } ret = max_data_bytes; } RESTORE_STACK; return ret; } #ifdef FIXED_POINT #ifndef DISABLE_FLOAT_API opus_int32 opus_encode_float(OpusEncoder *st, const float *pcm, int analysis_frame_size, unsigned char *data, opus_int32 max_data_bytes) { int i, ret; int frame_size; int delay_compensation; VARDECL(opus_int16, in); ALLOC_STACK; if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY) delay_compensation = 0; else delay_compensation = st->delay_compensation; frame_size = compute_frame_size(pcm, analysis_frame_size, st->variable_duration, st->channels, st->Fs, st->bitrate_bps, delay_compensation, downmix_float, st->analysis.subframe_mem); ALLOC(in, frame_size*st->channels, opus_int16); for (i=0;ichannels;i++) in[i] = FLOAT2INT16(pcm[i]); ret = opus_encode_native(st, in, frame_size, data, max_data_bytes, 16, pcm, analysis_frame_size, 0, -2, st->channels, downmix_float, 1); RESTORE_STACK; return ret; } #endif opus_int32 opus_encode(OpusEncoder *st, const opus_int16 *pcm, int analysis_frame_size, unsigned char *data, opus_int32 out_data_bytes) { int frame_size; int delay_compensation; if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY) delay_compensation = 0; else delay_compensation = st->delay_compensation; frame_size = compute_frame_size(pcm, analysis_frame_size, st->variable_duration, st->channels, st->Fs, st->bitrate_bps, delay_compensation, downmix_int #ifndef DISABLE_FLOAT_API , st->analysis.subframe_mem #endif ); return opus_encode_native(st, pcm, frame_size, data, out_data_bytes, 16, pcm, analysis_frame_size, 0, -2, st->channels, downmix_int, 0); } #else opus_int32 opus_encode(OpusEncoder *st, const opus_int16 *pcm, int analysis_frame_size, unsigned char *data, opus_int32 max_data_bytes) { int i, ret; int frame_size; int delay_compensation; VARDECL(float, in); ALLOC_STACK; if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY) delay_compensation = 0; else delay_compensation = st->delay_compensation; frame_size = compute_frame_size(pcm, analysis_frame_size, st->variable_duration, st->channels, st->Fs, st->bitrate_bps, delay_compensation, downmix_int, st->analysis.subframe_mem); ALLOC(in, frame_size*st->channels, float); for (i=0;ichannels;i++) in[i] = (1.0f/32768)*pcm[i]; ret = opus_encode_native(st, in, frame_size, data, max_data_bytes, 16, pcm, analysis_frame_size, 0, -2, st->channels, downmix_int, 0); RESTORE_STACK; return ret; } opus_int32 opus_encode_float(OpusEncoder *st, const float *pcm, int analysis_frame_size, unsigned char *data, opus_int32 out_data_bytes) { int frame_size; int delay_compensation; if (st->application == OPUS_APPLICATION_RESTRICTED_LOWDELAY) delay_compensation = 0; else delay_compensation = st->delay_compensation; frame_size = compute_frame_size(pcm, analysis_frame_size, st->variable_duration, st->channels, st->Fs, st->bitrate_bps, delay_compensation, downmix_float, st->analysis.subframe_mem); return opus_encode_native(st, pcm, frame_size, data, out_data_bytes, 24, pcm, analysis_frame_size, 0, -2, st->channels, downmix_float, 1); } #endif int opus_encoder_ctl(OpusEncoder *st, int request, ...) { int ret; CELTEncoder *celt_enc; va_list ap; ret = OPUS_OK; va_start(ap, request); celt_enc = (CELTEncoder*)((char*)st+st->celt_enc_offset); switch (request) { case OPUS_SET_APPLICATION_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if ( (value != OPUS_APPLICATION_VOIP && value != OPUS_APPLICATION_AUDIO && value != OPUS_APPLICATION_RESTRICTED_LOWDELAY) || (!st->first && st->application != value)) { ret = OPUS_BAD_ARG; break; } st->application = value; } break; case OPUS_GET_APPLICATION_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->application; } break; case OPUS_SET_BITRATE_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if (value != OPUS_AUTO && value != OPUS_BITRATE_MAX) { if (value <= 0) goto bad_arg; else if (value <= 500) value = 500; else if (value > (opus_int32)300000*st->channels) value = (opus_int32)300000*st->channels; } st->user_bitrate_bps = value; } break; case OPUS_GET_BITRATE_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = user_bitrate_to_bitrate(st, st->prev_framesize, 1276); } break; case OPUS_SET_FORCE_CHANNELS_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if((value<1 || value>st->channels) && value != OPUS_AUTO) { goto bad_arg; } st->force_channels = value; } break; case OPUS_GET_FORCE_CHANNELS_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->force_channels; } break; case OPUS_SET_MAX_BANDWIDTH_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if (value < OPUS_BANDWIDTH_NARROWBAND || value > OPUS_BANDWIDTH_FULLBAND) { goto bad_arg; } st->max_bandwidth = value; if (st->max_bandwidth == OPUS_BANDWIDTH_NARROWBAND) { st->silk_mode.maxInternalSampleRate = 8000; } else if (st->max_bandwidth == OPUS_BANDWIDTH_MEDIUMBAND) { st->silk_mode.maxInternalSampleRate = 12000; } else { st->silk_mode.maxInternalSampleRate = 16000; } } break; case OPUS_GET_MAX_BANDWIDTH_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->max_bandwidth; } break; case OPUS_SET_BANDWIDTH_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if ((value < OPUS_BANDWIDTH_NARROWBAND || value > OPUS_BANDWIDTH_FULLBAND) && value != OPUS_AUTO) { goto bad_arg; } st->user_bandwidth = value; if (st->user_bandwidth == OPUS_BANDWIDTH_NARROWBAND) { st->silk_mode.maxInternalSampleRate = 8000; } else if (st->user_bandwidth == OPUS_BANDWIDTH_MEDIUMBAND) { st->silk_mode.maxInternalSampleRate = 12000; } else { st->silk_mode.maxInternalSampleRate = 16000; } } break; case OPUS_GET_BANDWIDTH_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->bandwidth; } break; case OPUS_SET_DTX_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if(value<0 || value>1) { goto bad_arg; } st->use_dtx = value; } break; case OPUS_GET_DTX_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->use_dtx; } break; case OPUS_SET_COMPLEXITY_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if(value<0 || value>10) { goto bad_arg; } st->silk_mode.complexity = value; celt_encoder_ctl(celt_enc, OPUS_SET_COMPLEXITY(value)); } break; case OPUS_GET_COMPLEXITY_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->silk_mode.complexity; } break; case OPUS_SET_INBAND_FEC_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if(value<0 || value>1) { goto bad_arg; } st->silk_mode.useInBandFEC = value; } break; case OPUS_GET_INBAND_FEC_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->silk_mode.useInBandFEC; } break; case OPUS_SET_PACKET_LOSS_PERC_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if (value < 0 || value > 100) { goto bad_arg; } st->silk_mode.packetLossPercentage = value; celt_encoder_ctl(celt_enc, OPUS_SET_PACKET_LOSS_PERC(value)); } break; case OPUS_GET_PACKET_LOSS_PERC_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->silk_mode.packetLossPercentage; } break; case OPUS_SET_VBR_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if(value<0 || value>1) { goto bad_arg; } st->use_vbr = value; st->silk_mode.useCBR = 1-value; } break; case OPUS_GET_VBR_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->use_vbr; } break; case OPUS_SET_VOICE_RATIO_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if (value<-1 || value>100) { goto bad_arg; } st->voice_ratio = value; } break; case OPUS_GET_VOICE_RATIO_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->voice_ratio; } break; case OPUS_SET_VBR_CONSTRAINT_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if(value<0 || value>1) { goto bad_arg; } st->vbr_constraint = value; } break; case OPUS_GET_VBR_CONSTRAINT_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->vbr_constraint; } break; case OPUS_SET_SIGNAL_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if(value!=OPUS_AUTO && value!=OPUS_SIGNAL_VOICE && value!=OPUS_SIGNAL_MUSIC) { goto bad_arg; } st->signal_type = value; } break; case OPUS_GET_SIGNAL_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->signal_type; } break; case OPUS_GET_LOOKAHEAD_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->Fs/400; if (st->application != OPUS_APPLICATION_RESTRICTED_LOWDELAY) *value += st->delay_compensation; } break; case OPUS_GET_SAMPLE_RATE_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->Fs; } break; case OPUS_GET_FINAL_RANGE_REQUEST: { opus_uint32 *value = va_arg(ap, opus_uint32*); if (!value) { goto bad_arg; } *value = st->rangeFinal; } break; case OPUS_SET_LSB_DEPTH_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if (value<8 || value>24) { goto bad_arg; } st->lsb_depth=value; } break; case OPUS_GET_LSB_DEPTH_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->lsb_depth; } break; case OPUS_SET_EXPERT_FRAME_DURATION_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if (value != OPUS_FRAMESIZE_ARG && value != OPUS_FRAMESIZE_2_5_MS && value != OPUS_FRAMESIZE_5_MS && value != OPUS_FRAMESIZE_10_MS && value != OPUS_FRAMESIZE_20_MS && value != OPUS_FRAMESIZE_40_MS && value != OPUS_FRAMESIZE_60_MS && value != OPUS_FRAMESIZE_VARIABLE) { goto bad_arg; } st->variable_duration = value; celt_encoder_ctl(celt_enc, OPUS_SET_EXPERT_FRAME_DURATION(value)); } break; case OPUS_GET_EXPERT_FRAME_DURATION_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) { goto bad_arg; } *value = st->variable_duration; } break; case OPUS_SET_PREDICTION_DISABLED_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if (value > 1 || value < 0) goto bad_arg; st->silk_mode.reducedDependency = value; } break; case OPUS_GET_PREDICTION_DISABLED_REQUEST: { opus_int32 *value = va_arg(ap, opus_int32*); if (!value) goto bad_arg; *value = st->silk_mode.reducedDependency; } break; case OPUS_RESET_STATE: { void *silk_enc; silk_EncControlStruct dummy; char *start; silk_enc = (char*)st+st->silk_enc_offset; #ifndef DISABLE_FLOAT_API tonality_analysis_reset(&st->analysis); #endif start = (char*)&st->OPUS_ENCODER_RESET_START; OPUS_CLEAR(start, sizeof(OpusEncoder) - (start - (char*)st)); celt_encoder_ctl(celt_enc, OPUS_RESET_STATE); silk_InitEncoder( silk_enc, st->arch, &dummy ); st->stream_channels = st->channels; st->hybrid_stereo_width_Q14 = 1 << 14; st->prev_HB_gain = Q15ONE; st->first = 1; st->mode = MODE_HYBRID; st->bandwidth = OPUS_BANDWIDTH_FULLBAND; st->variable_HP_smth2_Q15 = silk_LSHIFT( silk_lin2log( VARIABLE_HP_MIN_CUTOFF_HZ ), 8 ); } break; case OPUS_SET_FORCE_MODE_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); if ((value < MODE_SILK_ONLY || value > MODE_CELT_ONLY) && value != OPUS_AUTO) { goto bad_arg; } st->user_forced_mode = value; } break; case OPUS_SET_LFE_REQUEST: { opus_int32 value = va_arg(ap, opus_int32); st->lfe = value; ret = celt_encoder_ctl(celt_enc, OPUS_SET_LFE(value)); } break; case OPUS_SET_ENERGY_MASK_REQUEST: { opus_val16 *value = va_arg(ap, opus_val16*); st->energy_masking = value; ret = celt_encoder_ctl(celt_enc, OPUS_SET_ENERGY_MASK(value)); } break; case CELT_GET_MODE_REQUEST: { const CELTMode ** value = va_arg(ap, const CELTMode**); if (!value) { goto bad_arg; } ret = celt_encoder_ctl(celt_enc, CELT_GET_MODE(value)); } break; default: /* fprintf(stderr, "unknown opus_encoder_ctl() request: %d", request);*/ ret = OPUS_UNIMPLEMENTED; break; } va_end(ap); return ret; bad_arg: va_end(ap); return OPUS_BAD_ARG; } void opus_encoder_destroy(OpusEncoder *st) { opus_free(st); }